In this lesson, you will learn how to implement pytest fixtures. Many unit tests have the same resource requirements. For example, an instantiated object from a class. You will learn how to create the instance of the class one time as a fixture and reuse that object across all your tests. This results in faster tests, eliminates duplicate code, and uses less resources when running your tests.
"""
Python class for a self-driving car.
Suitable for disrupting automotive industry
"""
class
Car(object):
def
__init__
(self, speed, state):
self.speed = speed
self.state = state
def start(self):
self.state = "running"return self.state
def turn_off(self):
self.state = "off"return self.state
def accelerate(self):
self.speed += 10
return self.speed
def stop(self):
self.speed = 0
return self.speed
test:
"""
Tests for Car class
"""
import
pytest
from car import Car
class TestCar(object):
"""
default scope is "function" which means
foreach test, it will have its own scope
"module" ref to class itself, so it sharing
the same instance
"""
@pytest.fixture(scope="module")
def my_car(self):
return Car(0, "off")
def test_start(self, my_car):
my_car.start()
assert my_car.state == "running"def test_turn_off(self, my_car):
my_car.turn_off()
assert my_car.state == "off"def test_accelerate(self, my_car):
my_car.accelerate()
assert my_car.speed == 10
"""
This one will failed because we are using fixture
scope as "module", my_car.speed == 20
"""def test_accelerate1(self, my_car):
my_car.accelerate()
assert my_car.speed == 10
def test_stop(self, my_car):
my_car.stop()
assert my_car.speed == 0
原文：https://www.cnblogs.com/Answer1215/p/8460290.html
【说明】：本文章由站长整理发布，文章内容不代表本站观点，如文中有侵权行为，请与本站客服联系(QQ:254677821)！